User's Manual

The test timer determines how long tests are performed. The modem automatically ends the test when the
test time is expired. The default value of 000 disables the test timer. When the timer is thus disabled, all
tests must be ended with the &T0 command.
Range: 0 - 255 seconds.
S21 V.24/General Bit Mapped Options
Bit Value Description
bit 0 0 &J0.
1 &J1.
bit 2 0 &R0.
1 &R1.
bit 3,4 00 &D0.
01 &D1.
10 &D2.
11 &D3.
bit 5 0 &C0.
1 &C1.
bit 6 0 &S0.
1 &S1.
bit 7 0 Y0.
1 Y1.
S22 SPEAKER/Results Bit Mapped Options
Bit Value Description
bit 0,1 00 Select L0.
01 Select L1.
10 Select L2.
11 Select L3.
bit 2,3 00 Select M0.
01 Select M1.
10 Select M2.
11 Select M3.
bit 4,5,6 000 Select X0.
001 Reserved.
010 Reserved.
011 Reserved.
100 Select X1.
101 Select X2.
110 Select X3.
111 Select X4
bit 7 [RESERVED]
S23 Bit Mapped Options
Bit Value Description
bit 0 0 &T5.
1 &T4. (default)
bit 1,2,3 000 Communications rate = 300 bps.
001 Communications rate = 600 bps.
010 Communications rate = 1200 bps.
011 Communications rate = 2400 bps.
100 Communications rate = 4800 bps.
101 Communications rate = 9600 bps.
110 Communications rate = 19200 bps.
111 Communications rate = 38400 bps or higher.
bit 4,5 00 Even parity selected.
01 Not used.
10 Odd.